hmm, will get a pic as soon as but likely Friday. LED cannot be seen with the cover on, but with it off it's a narrow unit next to the contactors with 4 led on it - green, blue, orange and red. when power is applied the green lights up - when plugged into the car the orange (marked cons) one lights - yet to see blue or red (marked fault). I also have this black box about the size of a cigarette packet loose in there with wires coming in and 2 wires going out.
Nothing marked mainpine I could see just this unit with just enough space to have ZeroCarbonWorld on it with four (separate) led and labels for each of them.